Interactions of methane, ethane and pentane with the (110C) surface of γ-alumina

Adsorptions of methane, ethane and pentane on the γ-alumina (110C) surface are investigated with semi-empirical (PM3) cluster calculations. It is found that the abstraction of an H atom accompanied by the formation of a C–O bond is the most favorable reaction for methane on the alumina surface. For ethane– and pentane–alumina interactions, the abstraction of two H atoms accompanied by the formation of an alkene is the most favorable reaction. The surface Al atoms help to promote the reactions, but are not directly involved in the bond formation.

Methane, ethane and pentane can be dehydrogenated by interaction with a γ-alumina surface. Several interaction configurations lead to dehydrogenation, including this two-center interaction of methane. Figure optionsDownload as PowerPoint slide